ia64/kvm: compilation fix. export account_system_vtime.
[pv_ops_mirror.git] / include / asm-x86 / nops.h
blobad0bedd10b89c8e1a66c6ea6668e1d12c6a7b35b
1 #ifndef _ASM_NOPS_H
2 #define _ASM_NOPS_H 1
4 /* Define nops for use with alternative() */
6 /* generic versions from gas
7 1: nop
8 the following instructions are NOT nops in 64-bit mode,
9 for 64-bit mode use K8 or P6 nops instead
10 2: movl %esi,%esi
11 3: leal 0x00(%esi),%esi
12 4: leal 0x00(,%esi,1),%esi
13 6: leal 0x00000000(%esi),%esi
14 7: leal 0x00000000(,%esi,1),%esi
16 #define GENERIC_NOP1 ".byte 0x90\n"
17 #define GENERIC_NOP2 ".byte 0x89,0xf6\n"
18 #define GENERIC_NOP3 ".byte 0x8d,0x76,0x00\n"
19 #define GENERIC_NOP4 ".byte 0x8d,0x74,0x26,0x00\n"
20 #define GENERIC_NOP5 GENERIC_NOP1 GENERIC_NOP4
21 #define GENERIC_NOP6 ".byte 0x8d,0xb6,0x00,0x00,0x00,0x00\n"
22 #define GENERIC_NOP7 ".byte 0x8d,0xb4,0x26,0x00,0x00,0x00,0x00\n"
23 #define GENERIC_NOP8 GENERIC_NOP1 GENERIC_NOP7
25 /* Opteron 64bit nops
26 1: nop
27 2: osp nop
28 3: osp osp nop
29 4: osp osp osp nop
31 #define K8_NOP1 GENERIC_NOP1
32 #define K8_NOP2 ".byte 0x66,0x90\n"
33 #define K8_NOP3 ".byte 0x66,0x66,0x90\n"
34 #define K8_NOP4 ".byte 0x66,0x66,0x66,0x90\n"
35 #define K8_NOP5 K8_NOP3 K8_NOP2
36 #define K8_NOP6 K8_NOP3 K8_NOP3
37 #define K8_NOP7 K8_NOP4 K8_NOP3
38 #define K8_NOP8 K8_NOP4 K8_NOP4
40 /* K7 nops
41 uses eax dependencies (arbitary choice)
42 1: nop
43 2: movl %eax,%eax
44 3: leal (,%eax,1),%eax
45 4: leal 0x00(,%eax,1),%eax
46 6: leal 0x00000000(%eax),%eax
47 7: leal 0x00000000(,%eax,1),%eax
49 #define K7_NOP1 GENERIC_NOP1
50 #define K7_NOP2 ".byte 0x8b,0xc0\n"
51 #define K7_NOP3 ".byte 0x8d,0x04,0x20\n"
52 #define K7_NOP4 ".byte 0x8d,0x44,0x20,0x00\n"
53 #define K7_NOP5 K7_NOP4 ASM_NOP1
54 #define K7_NOP6 ".byte 0x8d,0x80,0,0,0,0\n"
55 #define K7_NOP7 ".byte 0x8D,0x04,0x05,0,0,0,0\n"
56 #define K7_NOP8 K7_NOP7 ASM_NOP1
58 /* P6 nops
59 uses eax dependencies (Intel-recommended choice)
60 1: nop
61 2: osp nop
62 3: nopl (%eax)
63 4: nopl 0x00(%eax)
64 5: nopl 0x00(%eax,%eax,1)
65 6: osp nopl 0x00(%eax,%eax,1)
66 7: nopl 0x00000000(%eax)
67 8: nopl 0x00000000(%eax,%eax,1)
69 #define P6_NOP1 GENERIC_NOP1
70 #define P6_NOP2 ".byte 0x66,0x90\n"
71 #define P6_NOP3 ".byte 0x0f,0x1f,0x00\n"
72 #define P6_NOP4 ".byte 0x0f,0x1f,0x40,0\n"
73 #define P6_NOP5 ".byte 0x0f,0x1f,0x44,0x00,0\n"
74 #define P6_NOP6 ".byte 0x66,0x0f,0x1f,0x44,0x00,0\n"
75 #define P6_NOP7 ".byte 0x0f,0x1f,0x80,0,0,0,0\n"
76 #define P6_NOP8 ".byte 0x0f,0x1f,0x84,0x00,0,0,0,0\n"
78 #if defined(CONFIG_MK7)
79 #define ASM_NOP1 K7_NOP1
80 #define ASM_NOP2 K7_NOP2
81 #define ASM_NOP3 K7_NOP3
82 #define ASM_NOP4 K7_NOP4
83 #define ASM_NOP5 K7_NOP5
84 #define ASM_NOP6 K7_NOP6
85 #define ASM_NOP7 K7_NOP7
86 #define ASM_NOP8 K7_NOP8
87 #elif defined(CONFIG_X86_P6_NOP)
88 #define ASM_NOP1 P6_NOP1
89 #define ASM_NOP2 P6_NOP2
90 #define ASM_NOP3 P6_NOP3
91 #define ASM_NOP4 P6_NOP4
92 #define ASM_NOP5 P6_NOP5
93 #define ASM_NOP6 P6_NOP6
94 #define ASM_NOP7 P6_NOP7
95 #define ASM_NOP8 P6_NOP8
96 #elif defined(CONFIG_X86_64)
97 #define ASM_NOP1 K8_NOP1
98 #define ASM_NOP2 K8_NOP2
99 #define ASM_NOP3 K8_NOP3
100 #define ASM_NOP4 K8_NOP4
101 #define ASM_NOP5 K8_NOP5
102 #define ASM_NOP6 K8_NOP6
103 #define ASM_NOP7 K8_NOP7
104 #define ASM_NOP8 K8_NOP8
105 #else
106 #define ASM_NOP1 GENERIC_NOP1
107 #define ASM_NOP2 GENERIC_NOP2
108 #define ASM_NOP3 GENERIC_NOP3
109 #define ASM_NOP4 GENERIC_NOP4
110 #define ASM_NOP5 GENERIC_NOP5
111 #define ASM_NOP6 GENERIC_NOP6
112 #define ASM_NOP7 GENERIC_NOP7
113 #define ASM_NOP8 GENERIC_NOP8
114 #endif
116 #define ASM_NOP_MAX 8
118 #endif